EP0141291B1 - Soupape de passage pour transmission automatique - Google Patents

Soupape de passage pour transmission automatique Download PDF

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Publication number
EP0141291B1
EP0141291B1 EP84111971A EP84111971A EP0141291B1 EP 0141291 B1 EP0141291 B1 EP 0141291B1 EP 84111971 A EP84111971 A EP 84111971A EP 84111971 A EP84111971 A EP 84111971A EP 0141291 B1 EP0141291 B1 EP 0141291B1
Authority
EP
European Patent Office
Prior art keywords
spring
spool
pressure
valve
plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP84111971A
Other languages
German (de)
English (en)
Other versions
EP0141291A3 (en
EP0141291A2 (fr
Inventor
Takashi Shibayama
Kazuhiko Sugano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of EP0141291A2 publication Critical patent/EP0141291A2/fr
Publication of EP0141291A3 publication Critical patent/EP0141291A3/en
Application granted granted Critical
Publication of EP0141291B1 publication Critical patent/EP0141291B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
    • F16H61/0265—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
    • F16H61/0267—Layout of hydraulic control circuits, e.g. arrangement of valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated
    • Y10T137/8663—Fluid motor

Definitions

  • the present invention relates to a shift valve for an automatic transmission.
  • FIG. 1 A representative example of conventional shift valves is illustrated in Fig. 1.
  • This conventional shift valve for an automatic transmission comprises a spool 10 for switching an oil delivery conduit, a plug 12, and a spring 14 arranged between them.
  • Governor pressure P G acts on the spool 10 in one direction
  • throttle pressure P TH acts on the plug 12 in another direction which is opposite to the one direction.
  • a change-over characteristic as shown in Fig. 2 i.e., a shift schedule line
  • This shift schedule line consists of a line portion A representing that governor pressure P G varies with throttle pressure P TH and another line portion B representing that governor pressue P G is unchanged irrespective of variation in throttle pressure P TH . If the force of the spring 14 is changed, the governor pressure value P G for the line portion B can be varied, but the line portion A remains unchanged. (In order to change the line portion A, a pressure acting area of the spool 10 or the plug 12 must be varied.)
  • a shift valve according to the preamble part of Claim 1 is known from reference "Automatische Automobilgetriebe” by J. Stüper (Springer Verlag 1965) on pages 322 to 339 showing a DAIMLER-BENZ automatic transmission.
  • the preamble part of Claim 1 is based on the shift valve which is shown in Figure 301 of the afore-mentioned document.
  • the 1-2 shift valve of the Daimler automatic transmission shown in Figure 301 includes a spool (5) which is urged in the downshift direction by the throttle pressure and a first spring located between a plug (4) and the spool and in the upshift direction by the governor pressure and a second spring.
  • the force of the second spring is stronger than the force of the first spring, whereby the transmission is shifted in the second speed at zero speed and zero throttle in order to avoid creep.
  • Fig. 3 shows a shift valve for an automatic transmission according to the present invention.
  • This shift valve comprises a spool 22 and a plug 24 which are slidably fit in a valve bore formed in a valve body 20.
  • retainers 32 and 34 are mounted by pins 26 and 28, respectively.
  • a first spring 36 Between the spool 22 and the plug 24 is arranged a first spring 36.
  • a second spring 38 Between the retainer 32 and the spool 22 is arranged a second spring 38.
  • a force of the second spring 38 is smaller than a force of the first spring 36.
  • the valve body 20 is formed with oil grooves 20a to 20h.
  • the oil groove 20a is connected to a throttle pressure circuit.
  • the oil grooves 20b and 20f are connected to a kickdown pressure circuit.
  • the oil groove 20c is a drain port.
  • the oil groove 20d is connected to a circuit that communicates with a clutch 40.
  • the port 20e is connected to a circuit that communicates with a source of oil pressure 42.
  • the ports 20g and 20h are connected to a governor pressure circuit which receives governor pressure representative of vehicle speed.
  • the ports 20b and 20f are drained.
  • a leftward force due to governor pressure P G supplied from the oil groove 20h and another leftward force due to the second spring 38 act on the spool 22.
  • a rightward force due to the first spring 36 or after the plug 24 has come into contact with the spool 22 a force with which throttle pressure P TH supplied from the oil groove 20a acts on the plug 24 is added to the rightward force due to the first spring 36.
  • the spool 22 is movable so as to balance the total of the above mentioned leftward forces with the total of the rightward forces and is shiftable between a down position as indicated by a bottom half and an up position as indicated by an upper half.
  • a value of an intersecting point a where an extended line of the line portion A intersects with an ordinate is determined by the force of the spring 38. Therefore, varying the force of the second spring 38 will result in shifting of the line portion A in a vertical direction as viewed in Fig. 4. That is, if the force of the second spring 38 is set large, the line portion A shown in Fig. 4 moves upward, whereas the force of the second spring 38 is set small, the line portion A moves downward. If the force of the second spring 38 is set zero (that is, the second spring 38 is taken away), the value a becomes zero so that the line portion A intersects with the origin of the coordinate axes, resulting in providing the same shift schedule line as shown in Fig. 2.
  • a value b of an intersecting point where the line portion B intersects with the abcissa can be varied by varying the force of the first spring 36 in the similar manner employed by the conventional shift valve.
  • the force of the second spring 38 is set smaller than the force of the first spring 36. If the force of the second spring 38 is set larger, the spool 22 always assumes the up position when the throttle pressure P TH approaches zero, thud providing inappropriate shift schedule line.
  • both of the line portion A and line portion B of the shift schedule line as shown in Fig. 4 can be varied by varying the spring force of the second spring 38 and the force of the first spring 36, thus providing a desired shape of shift schedule line.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Claims (2)

  1. Soupape de changement pour transmission automatique comprenant un corps de sou pape (20) formé avec une ouverture de soupape, une tige (22) et un plot (24) monté à plissement dans ladite ouverture de soupape, la tige (22) étant sollicitée suivant une première direction par un ressort (36) et le plot (24) étant sollicité par le premier ressort (36) suivant une seconde direction opposée, le premier ressort (36) étant positionné entre le plot (24) et la tige (22), ainsi qu'un second ressort (28) prévu pour solliciter la tige (22) suivant la seconde direction, cette tige (22) possédant une aire d'application de pression sur laquelle une pression de déclenchement (PG) est appliquée et étant sollicitée suivant une seconde direction lorsque la pression de déclenchement est appliquée à cette surface d'application de pression, ledit plot (24) présentant une surface d'application de pression sur laquelle une pression représentative de l'accélération (PTH) et étant sollicitée suivant la première direction de manière à solliciter la tige (22) suivant la première direction via le premier ressort (36) quand la pression représentative d'accélération (PTH) est appliquée à ladite aire d'application de pression du plot (24), la soupape de changement étant caractérisée en ce que la force du second ressort (38) est inférieure à la force du premier ressort (36).
  2. Soupape de changement selon la revendication 1, caractérisé en ce que le second ressort (38) est disposé dans un alésage du corps de soupape (20) entre ladite tige (22) et une extrémité de soupape (32) qui ferme une extrémité de cet alésage du corps de soupape (20).
EP84111971A 1983-10-07 1984-10-05 Soupape de passage pour transmission automatique Expired - Lifetime EP0141291B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP187088/83 1983-10-07
JP58187088A JPS6081555A (ja) 1983-10-07 1983-10-07 自動変速機のシフトバルブ

Publications (3)

Publication Number Publication Date
EP0141291A2 EP0141291A2 (fr) 1985-05-15
EP0141291A3 EP0141291A3 (en) 1985-09-18
EP0141291B1 true EP0141291B1 (fr) 1991-12-18

Family

ID=16199899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111971A Expired - Lifetime EP0141291B1 (fr) 1983-10-07 1984-10-05 Soupape de passage pour transmission automatique

Country Status (4)

Country Link
US (1) US4587887A (fr)
EP (1) EP0141291B1 (fr)
JP (1) JPS6081555A (fr)
DE (1) DE3485366D1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63312555A (ja) * 1987-06-15 1988-12-21 Nissan Motor Co Ltd 自動変速機の油圧制御装置
JP2543527B2 (ja) * 1987-06-15 1996-10-16 日産自動車株式会社 自動変速機のシフトバルブ
US6357311B1 (en) 2000-02-10 2002-03-19 Zf Meritor Electrical transmission range shift system with non-continuous duty solenoid valve
JP4179991B2 (ja) * 2002-04-26 2008-11-12 ミリポア・コーポレイション 使い捨て無菌流体輸送デバイス
US7293477B2 (en) 2003-12-23 2007-11-13 Millipore Corporation Disposable, pre-sterilized fluid receptacle sampling device
US7578205B2 (en) * 2005-06-01 2009-08-25 Millipore Corporation Sterile sampling device
SG153002A1 (en) 2007-11-16 2009-06-29 Millipore Corp Fluid transfer device
FR2940439B1 (fr) 2008-12-18 2011-02-11 Millipore Corp Dispositif pour le transfert d'un milieu
FR2940440B1 (fr) 2008-12-18 2010-12-24 Millipore Corp Dispositif pour le transfert d'un milieu
US8544497B2 (en) 2009-10-30 2013-10-01 Emd Millipore Corporation Fluid transfer device and system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733732A (en) * 1956-02-07 baker
US2604197A (en) * 1946-08-30 1952-07-22 William T Livermore Automatic fluid pressure transmission
US3096666A (en) * 1955-12-22 1963-07-09 Gen Motors Corp Transmission
JPS5531341B2 (fr) * 1973-09-18 1980-08-18
JPS539341B2 (fr) * 1973-10-18 1978-04-05
JPS6011272B2 (ja) * 1977-06-22 1985-03-25 アイシン精機株式会社 自動車の無段変速機の速度比自動制御装置
CA1140392A (fr) * 1978-07-24 1983-02-01 David A. Schuster Pompe a cylindree variable
US4274308A (en) * 1978-11-06 1981-06-23 Nissan Motor Company, Limited Shock control arrangement in hydraulic control system
JPS5655749A (en) * 1979-10-15 1981-05-16 Nissan Motor Co Ltd Speed changing shock reducing device for automatic change gear
US4532829A (en) * 1983-07-29 1985-08-06 Nissan Motor Company, Ltd. Hydraulic control system for automatic transmission

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Automatische Automobilgetriebe by J. STÜPER ( Springer Verlag 1965 ) p. 322-339 *

Also Published As

Publication number Publication date
JPS6081555A (ja) 1985-05-09
EP0141291A3 (en) 1985-09-18
US4587887A (en) 1986-05-13
EP0141291A2 (fr) 1985-05-15
JPH052856B2 (fr) 1993-01-13
DE3485366D1 (de) 1992-01-30

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